/Engine/Plugins/MovieScene/MovieRenderPipeline/Source/MovieRenderPipelineSettings/Public/MoviePipelineBurnInWidget.h
Called on the first temporal and first spatial sample of each output frame with the information about the frame being produced.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintImplementableEvent) void OnOutputFrameStarted ( [UMoviePipeline](API\Plugins\MovieRenderPipelineCore\UMoviePipeline) * ForPipeline )